NDLI: Physical layer security and energy efficiency driven resource optimisation for cognitive relay networks

Content Provider	IET Digital Library
Author	Yang, Weiwei Zhao, Xiaohui He, Jiazhou
Abstract	In this study, a resource allocation problem considering physical layer security and power consumption for cognitive relay networks is studied. In a secondary network, the ratio of secret rate to power consumption is defined as a secret rate per watt (SRW). Fixed circuit power, dynamic circuit power, and transmit power are all considered in the power consumption model. Under the constraints of the maximum total transmit power of secondary user transmitters and relay nodes, minimum secret rate requirement of secondary user receiver and tolerable interference threshold of each primary user receiver, the authors propose a SRW maximisation algorithm to maximise SRW. The resource allocation problem is formulated as a non-linear fractional programming and it is transformed into an equivalent subtraction based on the Dinkelbach method. They incorporate the non-convex constraints into the objective function to convert the feasible region into a convex set and achieve an optimal resource allocation scheme with the nested loop iteration algorithm through the Lagrange dual theory and the difference of convex programming. By the Dinkelbach method and the nested loop iteration algorithm, the optimal SRW is obtained. Simulation results demonstrate the effectiveness and the out-performance of the proposed algorithm comparing with other algorithms.
Starting Page	2953
Ending Page	2961
Page Count	9
ISSN	17518628
Volume Number	14
e-ISSN	17518636
Issue Number	Issue 17, Oct (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/14/17
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2019.1267
Journal	IET Communications
Publisher Date	2020-07-30
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Cognitive Radio Cognitive Relay Network Concave Programming Convex Programming Dinkelbach Method Dynamic Circuit Power Energy Conservation Energy Efficiency Driven Resource Optimisation Fixed Circuit Power Interpolation And Function Approximation Iterative Method Maximum Total Transmit Power Minimum Secret Rate Requirement Nested Loop Iteration Algorithm Nonconvex Constraint Nonlinear Fractional Programming Numerical Analysis Optimal Resource Allocation Scheme Optimal SRW Optimisation Optimisation Technique Physical Layer Security Power Consumption Model Primary User Receiver Radio Link And Equipment Relay Network Relay Node Resource Allocation Resource Allocation Problem Secondary Network Secondary User Receiver Secondary User Transmitters SRW Maximisation Algorithm Telecommunication Telecommunication Power Supplies Tolerable Interference Threshold
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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